Grats on ur 1st OC m8. (u are on the path now, theres no turning back
As for tips on the rest, give the forum a real scout around, theres loads of info on here.
Basic, most basic, wall u bang ur head against is heat. All the other components, bus speeds, voltages, all pit their wits against u to produce more and more heat the higher u go. The components have their operational limits, so the better u can cool them, the better.